RU2253406C1 - Method for manufacturing individual imprint spoon - Google Patents

Abstract

FIELD: medicine.

SUBSTANCE: method involves producing jaw imprint, molding gypsum model, manufacturing imprint spoon and perforating it next to it. The available teeth are isolated with double layer of base wax on gypsum model. Then, self-hardening plastic is applied. The so produced imprint spoon is perforated allover its surface. Spoon boundaries are fitted in correspondence to prosthesis bed.

EFFECT: high accuracy in producing imprints.

Description

The invention relates to medicine, namely to dentistry, and can be used to take impressions for complete removable dentures-dentures before tooth extraction.

There is a method of manufacturing an impression tray (for fixed prostheses) by obtaining a preliminary impression of the dentition, casting the model, applying an insulating material to the gypsum model in the area of the alveolar ridge crest and gingival margin of the abutment teeth of the supporting teeth, and coating the model surface with coarse salt in liquid glass. According to the model, a spoon is made using thermal vacuum, perforated in the area of the crest of the alveolar ridge and the gingival margin of the supporting teeth / a.s. No. 1561969 A1, cl. A 61 C 9/00, 11.24.1987 /.

The disadvantages of this method include the fact that the perforation area is limited by the crest of the alveolar ridge under the intermediate part of the bridge and the gingival margin of the abutment teeth, which does not allow to obtain uniform pressure over the entire area of the prosthetic bed covered with a spoon. In addition, the method involves the removal of only anatomical casts without the use of functional tests, which significantly reduces the accuracy of the method. An extremely complex and labor-intensive isolation system, including isolation of the crest of the alveolar ridge and the gingival margin of the abutment teeth with cement, placing the model in liquid glass, coating the model with coarse-grained salt and then dissolving it in water after making the spoon, limits its widespread use in practice due to the high labor costs.

The aim of the invention is to increase the accuracy of obtaining casts for complete removable dentures in the presence of teeth, simplifying the method and reducing the complexity of manufacturing a spoon.

This goal is achieved by the fact that in the method of manufacturing an individual impression spoon by obtaining an impression of the jaw, casting a gypsum model, manufacturing an impression spoon with its subsequent perforation, the distinctive feature is that the existing teeth on the gypsum model are isolated with a double layer of base wax on the prepared gypsum model self-hardening plastic is applied, the resulting impression spoon is uniformly perforated over the entire surface.

The method is as follows.

An impression is taken using a standard impression spoon using functional tests, casting of gypsum models, marking the boundaries of the base of the removable denture, isolating the existing teeth with a double layer of base wax, followed by applying a layer of self-hardening plastic and forming an individual impression spoon. After the plastic has hardened, the spoon is perforated over the entire surface with a cutter to hold the alginate mass and create uniform pressure and adjusted in the oral cavity as a spoon for complete removable dentures. The print is removed with alginate masses with the obligatory performance of functional tests.

Example

Patient R. addressed the clinic with complaints of defects in the dentition and tooth mobility. According to the clinical examination, the mobility was determined 17, 16, 15, 14, 13, 12, 11, 21, 22, 23, 24, 25, 26, 37, 36, 35, 34, 33, 32, 31,41,43, 45, 46, 47 teeth 3-4 degrees. According to x-ray examination, atrophy of bone tissue is 2 / 3-3 / 4 of the length of the roots of the teeth. Based on the data obtained, it was decided to remove the teeth with the manufacture of artificial dentures on the upper and lower jaws. Impressions were taken with standard spoons using functional gestures, models made of gypsum were cast, denture borders were marked, then the teeth on the models were isolated with a double layer of base wax, then a layer of self-hardening plastic was applied and individual impression spoons were formed. After the plastic hardened, the spoons were perforated over the entire surface with a cutter. In the oral cavity, the borders of the spoons were adjusted as for complete removable dentures on the toothless jaws. The prints were taken with an alginate mass using functional tests. After casting gypsum models, determining central occlusion, plastering models into an occluder, the teeth were cut off on the models and full dentures were made. After the removal of all teeth at once, complete removable dentures were installed on the upper and lower jaws. Dentures were well fixed.

Thus, the developed individual spoons allow you to take high-precision casts for the manufacture of full and partial removable artificial dentures in the presence of teeth. The simplicity of the technology makes it possible to apply this method as widely as the manufacture of ordinary individual spoons for complete removable dentures.

Claims (1)

A method of manufacturing an individual impression spoon by obtaining an impression of the jaw, casting a gypsum model, manufacturing an impression spoon with its subsequent perforation, characterized in that the existing teeth on the gypsum model are isolated with a double layer of base wax, after which self-hardening plastic is applied, the resulting impression spoon is perforated over the entire surface and adjust the borders of the spoon in accordance with the borders of the prosthetic bed.